20412784

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:254

約数の個数: 80

約数和(自身を含む): 48854016

約数和(自身を除く): 28441232

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 68, 71, 112, 119, 136, 142, 151, 238, 272, 284, 302, 476, 497, 568, 604, 952, 994, 1057, 1136, 1207, 1208, 1904, 1988, 2114, 2414, 2416, 2567, 3976, 4228, 4828, 5134, 7952, 8449, 8456, 9656, 10268, 10721, 16898, 16912, 17969, 19312, 20536, 21442, 33796, 35938, 41072, 42884, 67592, 71876, 75047, 85768, 135184, 143752, 150094, 171536, 182257, 287504, 300188, 364514, 600376, 729028, 1200752, 1275799, 1458056, 2551598, 2916112, 5103196, 10206392, 20412784]

約数ペア:

[(1, 20412784), (2, 10206392), (4, 5103196), (7, 2916112), (8, 2551598), (14, 1458056), (16, 1275799), (17, 1200752), (28, 729028), (34, 600376), (56, 364514), (68, 300188), (71, 287504), (112, 182257), (119, 171536), (136, 150094), (142, 143752), (151, 135184), (238, 85768), (272, 75047), (284, 71876), (302, 67592), (476, 42884), (497, 41072), (568, 35938), (604, 33796), (952, 21442), (994, 20536), (1057, 19312), (1136, 17969), (1207, 16912), (1208, 16898), (1904, 10721), (1988, 10268), (2114, 9656), (2414, 8456), (2416, 8449), (2567, 7952), (3976, 5134), (4228, 4828)]